How do you peek a variant containing a complex value?

[Vinay Sajip]

The following program won't compile if I uncomment the if 
statement:

void main()
{
     Variant v = complex(1.0, 1.0);

//    if (v.peek!(Complex)) {
//        writeln("Complex");
//    }
     writeln(v);
}

I get the same error with v.peek!(complex), which is:

Error: template instance peek!(Complex) does not match template 
declaration peek(T)()

The variant can clearly hold a complex value. Someone please tell 
me - what am I doing wrong in the peek call?